This technology is a building corner joint structure that places an anti-collision member at the corner where two precast concrete curtain walls meet at a right angle, connecting this member to each curtain wall with steel rods to allow out-of-plane movement while restricting in-plane movement.
Previously, curtain walls meeting at right angles at building corners were installed with only a gap and no separate device. During an earthquake, curtain walls perpendicular to the seismic motion moved out-of-plane, while parallel ones moved in-plane, leading to collisions, damage, or falling debris that posed safety risks. Widening the gap to the maximum allowable inter-story displacement to avoid this resulted in poor aesthetics and issues with waterproofing and insulation.
This technology uses steel rods designed with lower flexural rigidity compared to axial rigidity, allowing them to bend under external force so that curtain walls move only out-of-plane while longitudinal displacement is restricted. A second steel rod or joint can be placed on the opposite side of the anti-collision member to restrict the in-plane displacement of the other curtain wall, with curtain walls connected to the structure via tie-back connections as before. Applicable to high-rise office buildings with precast concrete exteriors, seismic-resistant residential complexes, and factory-assembled panel buildings, it maintains narrow corner gaps to preserve aesthetics and performance while reducing collision-related falling hazards.
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